| 摘要 |
PURPOSE:To perform safe and smooth control of an axis, by constituting a vehicle such that, when the axle of a self-running working vehicle operative on an elevated spot is controlled, a boom axis coincides with the central line of a chassis, the center of gravity is alternately positined at the front and the rear of the chassis, and front and rear wheels are forced to alternately float away from a ground. CONSTITUTION:A swirl base stand 5 is swirled so that the axis of an expandable boom 6, contracted to its minimum size, coincides with the central line in a longitudinal direction of a chassis 1, and the center of gravity is positioned at the rear of the chassis 1. Thereafter, through expansion of a vertical cylinder 9 at the central part of the chassis, the front of the chassis 1 is raised to lift front wheels 2 and 2' away from a ground, and an inner box is protruded from an outer box through expansion of an expandable cylinder, not shown. Thereafter, the cylinder 9 is contracted, and the swirl base stand 5 is turned 180 deg.. This causes the center of gravity to be positioned at the front thereof, and by following the same control procedures, the inner boxes of rear wheels 3 and 3' are protruded therefrom. As noted above, control of the axis is effected through utilization of the position of the center of gravity, and this enables safe and smooth control of the axis. |
